JPH0944791A - On-vehicle navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evaluate the propriety of the running route inputted by a driver, etc., and to display a section in which a vehicle can not be run and a congested section and the reasons when such sections are included. SOLUTION: A route propriety judgment device 7 temporarily stores the route inputted via a running route input means 4. The route propriety judgment device 7 checks whether an input route is proper or not, based on the passing direction rules (for instance, data of the approach prohibition for each intersected point, turning to the left and right prohibitions and limit time, etc.,) stored in a road map data base. The route propriety judgment device 7 checks whether the input route is proper or not based on the latest traffic information (an accident, congestion information, etc.) obtained via a traffic information obtaining means 6. If a section which is not proper as the running route exists, the improper section and the reason are displayed with the map including the improper section on the screen of an image display device 13 in a display device 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device, and in particular, it evaluates the validity of an input travel route, and when it is unsuitable (when there is a section in which travel is impossible or a congested section is included), The present invention relates to a navigation device that displays a reason.

[0002]

2. Description of the Related Art Navigation devices for automatically setting a route to a destination are known. The vehicle route guidance device described in Japanese Examined Patent Publication No. 6-58230 discloses an adjacent unreachable intersection at each intersection and an unreachable adjacent road in consideration of a traffic direction rule such as entry prohibition or right / left turn prohibition. Providing basic information storage means that stores intersection data such as the amount of time correlation to each adjacent intersection and distinguishing it from each other, and by not selecting unreachable adjacent intersections, prohibiting entry or turning left or right The shortest route to the destination is automatically set according to the traffic direction rules such as.

In automatic route setting, a detour road desired by a driver or the like may not be extracted, or a road with a high traffic congestion frequency may be extracted. Therefore, an operation unit for setting a desired detour road and waypoint. A vehicle-mounted navigation device that includes a bypass road and a waypoint and sets a route that does not include a road with a high congestion frequency is disclosed in Japanese Patent Laid-Open No. 5-451.
No. 70 publication.

[0004]

However, since the conventional navigation device automatically sets the route, even if the automatically set route is unwilling to the driver, the reason why It is not possible to know if the route has been set. For this reason, even if you want to travel on a specific route even in a traffic jam, there is a possibility that traffic will be prohibited, and you may be forced to follow the automatically set route.

The present invention has been made in order to solve such a problem. A driver or the like specifies a desired route,
It is an object of the present invention to provide a navigation device capable of displaying the reason when the designated route is inappropriate.

[0006]

According to a first aspect of the present invention, there is provided a vehicle navigation system comprising: a road map database provided with data relating to traffic rules such as entry prohibition, right / left turn prohibition, and traffic restriction time. , Traffic information acquisition means for acquiring the latest traffic information, travel route input means for inputting a travel route, data regarding the traffic direction rules provided in the road map database, and traffic information acquisition means Based on the latest traffic information, it judges whether the input travel route is suitable for travel, and if it is judged to be inappropriate, a route adequacy judgment means that outputs an inappropriate point or section and an unsuitable reason. It is characterized in that it is provided with a display means for displaying an inappropriate point or section output from the route suitability determination means and an inappropriate reason.

A vehicle navigation device according to a second aspect of the present invention includes a road map database including data regarding a traffic direction rule such as entry prohibition, right / left turn prohibition, and traffic restriction time.
Based on the travel route input means for inputting the travel route and the data regarding the traffic direction rules provided in the road map database, it is determined whether the input travel route is suitable for traveling, and if it is determined to be unsuitable, it is not. It is characterized by comprising route appropriateness judging means for outputting an appropriate point or section and an unsuitable reason, and display means for displaying the unsuitable point or section outputted from the route suitability judging means and the reason for being unsuitable. And

According to another aspect of the vehicle navigation apparatus of the present invention, the latest traffic information acquisition means for acquiring the latest traffic information, the travel route input means for inputting the travel route, and the latest traffic information acquisition means are obtained. Based on the traffic information of
It judges whether the input traveling route is suitable for traveling, and if it judges that it is not suitable, it outputs the inappropriate point or section and the reason for the inappropriateness, and outputs it from the route appropriateness judging means. It is characterized in that it is provided with an unsuitable point or section and display means for displaying the unsuitable reason.

The route adequacy determining means determines whether the input traveling route is valid based on the data on the traffic direction rules stored in the road map database and the latest traffic information obtained through the traffic information obtaining means. Judge whether or not. When the input travel route is inappropriate, the inappropriate point or section and the reason for the inappropriate are displayed on the display means. Therefore, the driver or the like can determine whether to select another route according to the displayed content or to drive the input route. Since it is configured to obtain the latest traffic information via the traffic information acquisition means, if new accident and congestion information etc. is acquired even while driving,
It is possible to set an alternative route.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block configuration diagram of a vehicle-mounted navigation device according to the present invention. A vehicle-mounted navigation device 1 according to the present invention includes a road map database 2, a vehicle position detection device 3 for detecting the current position of a vehicle, a travel route input means 4 for inputting a desired travel route, Scheduled time input means 5 for inputting scheduled departure time, desired arrival time at destination, scheduled arrival time at transit point, scheduled departure time at transit point, etc., as well as to obtain the latest traffic information Traffic information acquisition means 6, a route suitability determination device 7 for determining whether the input travel route is appropriate, and a clock with a calendar function for supplying time data including year, month, day, and day of the week Based on the means 8, the route time storage means 9 which stores the traveling route determined to be appropriate by the route suitability determination device 7 and the scheduled traveling time in association with each other, and the traveling route stored in the route time storage means 9. vehicle Comprises a route guidance control unit 10 to induce the traveling direction, a road map, the current position of the vehicle, the travel route, the traveling scheduled time, the travel inappropriate route and a display means 11 for displaying the reason like. The traffic information acquisition unit 6 includes a wireless communication unit 61, a traffic information storage unit 62, and an external data input unit 63. The display unit 11 is the image signal generation unit 1
2, an image display device 13, and a voice synthesis output device 14.

The road map database 2 is a CD-ROM (compact disc RO in which road map information is recorded.
M) and its playback device. This road map database 2 includes map data for generating road maps of various scales such as wide area, middle area, and detail, and various displays displayed on the road map, such as highways, national roads, and local roads. Name, main building, railway, river, lake, etc. and its display data (character data including Kanji, etc.), and data on traffic rules such as entry prohibition and right / left turn prohibition set at each intersection. Standard travel time data between major intersections is stored in advance based on a predetermined database structure. Traffic direction rules such as no entry or no right or left turn are registered, including the time when the rules are applied. In the winter and the like, sections for which traffic is prohibited are registered together with data on periods during which traffic is allowed.

Position designation data or area designation data to be displayed from any of the vehicle position detection device 3, the route suitability determination device 7, and the route guidance control device 10, and map type designation data (wide area, middle area, details) When the map type designating data such as a map) is supplied, the reproducing device in the road map database 2 causes the road map such as map data of the designated area, display data, data on traffic direction rules, and road map such as passable period data. All data (hereinafter simply referred to as road data) 2a relating to the above is read from the CD-ROM, and the read road data 2a is supplied to the requesting devices 3, 7, and 10.

FIG. 2 is a block diagram showing a specific example of the vehicle position detecting device. The vehicle position detection device 3 includes a direction signal 31a from a direction sensor 31 such as a gyroscope or a geomagnetic sensor, and a pulse signal or the like output from a travel distance sensor 32 such as a wheel rotation sensor for each predetermined unit travel distance. The dead reckoning device 33 that sequentially calculates the position of the vehicle based on the distance signal 32a and the GPS position measuring device 35 that detects the position based on the signals from the plurality of GPS satellites received by the GPS receiving antenna 34 are used together. With this configuration, the current position can be estimated even when the radio wave from the GPS satellite cannot be received.

Further, the own vehicle position detecting device 3 outputs the traveling locus calculating means 36 for obtaining a traveling locus based on the vehicle position data 33a sequentially output from the dead reckoning device 33, and the traveling locus calculating means 36. Map matching for correcting the current position of the vehicle on the road by comparing the traveling locus data 36a with the road data 2a read from the road map database 2 and focusing on the characteristic portions of the traveling locus such as intersections and inflection points. Means 37 are provided.

Further, the vehicle position detection control means 38 in the vehicle position detecting device 3 is provided with a current position (initial position) of the vehicle.
If the setting operation of is not performed, the GPS measurement device 3
The position data 35a output from No. 5 is supplied to the dead reckoning device 33 as initial position or provisional position data 38a, and is output as the own vehicle position data 3a. Further, the vehicle position detection control means 3
Reference numeral 8 supplies the position correction data 37a output from the map matching means 37 to the dead reckoning device 33 to correct the current position data of the vehicle, and further, the latest vehicle position data 33a sequentially outputted from the dead reckoning device 33. Is supplied to the route suitability determination device 7 and the route guidance control device 10 as the vehicle position data 3a.

When the vehicle position detecting device 3 receives, through the wireless communication means 61, data on an intersection name or an intersection position transmitted from the roadside beacon device, the received intersection name or the intersection position is detected. The present position of the vehicle can be corrected based on the data related to.

The traveling route input means 4 shown in FIG. 1 is a key for activating or terminating the route input, a cursor key for moving a cursor for position designation, and a cursor for fixing the cursor position. It is provided with a position confirmation key, a key for selecting and switching maps, a function key for inputting types such as a departure place, a waypoint, and a destination. It should be noted that the position on the map displayed on the screen can be determined by using a pointing device (image position pointing device) such as a trackball, a mouse, a light pen, a touch screen, a joystick, etc. without providing a cursor key or a cursor position confirmation key. The configuration may be designated.

The scheduled time input means 5 is provided with keys for inputting year, month, day and time, and function keys for inputting types such as departure time, scheduled passage time and scheduled arrival time. In addition, only a key to activate the input of the scheduled time is provided,
By operating this start key, the year, month,
It is also possible to display an input screen for selectively inputting the day, time, departure time, scheduled passage time, estimated arrival time, etc., and input the scheduled time etc. using a pointing device (image position supporting device).

The traffic information acquisition means 6 has the latest information such as traffic congestion information that is difficult to register in the road map database 2, accident information, temporary closure information of entrances and exits of highways, etc., and prohibition information associated with road repair work and the like. A wireless communication means 61 for obtaining traffic information, which is used to obtain information that changes from moment to moment, and a traffic information storage means 62 for temporarily storing the latest traffic information obtained through the wireless communication means 61. ,
Information that can be known in advance such as traffic prohibition information accompanying road repair work and information on traffic direction regulations that are implemented by setting a predetermined period for holding various events is registered in advance in a memory card, for example. An external data input means 63 for inputting information registered in this memory card or the like is provided.

As the wireless communication means 61, a traffic information reception dedicated device for receiving traffic information transmitted from the FM broadcasting station by FM multiplex broadcasting, an optical beacon device installed on a general road or the like, or installed on a highway. It transmits and receives data to and from the radio beacon device, receives the latest traffic information provided by the traffic information providing center, etc., and also transmits the travel route data of the own vehicle to the traffic information providing center, etc. The two-way communication device is provided so as to obtain detailed traffic information regarding the traveling route of the own vehicle and detour route information at the time of traffic jam. The two-way communication device uses a mobile telephone device capable of digital data communication in addition to a device that communicates with a beacon device, and calls up a traffic information providing center to obtain the latest traffic information about a desired area or travel route. Alternatively, information on the detour road may be obtained.

FIG. 3 is a block diagram showing a specific example of the route suitability judging device. The route suitability determination device 7 includes an input operation control unit 71 and an input route time primary storage unit 72.
, Route automatic setting means 73, and route suitability determination means 74
And a route information storage means 75 and a restriction information storage means 76.

When the input request for the travel route is given from the travel route input means 4, the input operation control means 71 outputs a cursor display command 71a to input the travel route on the map displayed on the image display device 13. The cursor is displayed in combination, and the cursor position is moved according to the operation of the cursor key. Further, when a request for changing the map type or a request for displaying a map of an adjacent area is given from the travel route input means 4, an access request for the corresponding map is generated and the road data 2a requested from the road map database 2 is issued. And the extracted road data 2a is supplied to the image signal generator 12 to display the corresponding map on the screen of the image display device 13.

The input operation control means 71 determines whether the input mode is the departure place, the waypoint, or the destination based on the operation of the function keys, and the position on the map is specified by the operation of the cursor position determination key. In the case, the specified position data and the attribute data indicating whether the position is a departure place, a stopover, or a destination are stored in the input route time temporary storage means 72 in association with each other. The route position is associated with the designated order, and the input route time temporary storage means 7
Stored in 2.

The input operation control means 71 uses the scheduled time input means 5 in connection with the position designation to set the departure time, scheduled passage time,
When the estimated arrival time or the like is input, the specified position data, the specified time, and the type information thereof are associated with each other and stored in the input route time temporary storage means 72. When the input of the year, month, and day is omitted, the input operation control means 71 treats it as the current day, and when the designation of the departure place is omitted, the current position of the vehicle is regarded as the departure place, and the designation of the destination is omitted. If it does, the last specified point will be processed as the destination. If the time is not specified at all, the time when the input of the travel route is completed is processed as the departure time. When the input end command is given from the travel route input unit 4, the input operation control unit 71 outputs the route automatic setting request command 71b to activate the route automatic setting unit 73.

The route automatic setting means 73 first compares the route stored in the input route time temporary storage means 72 to the destination via each waypoint to the destination with the road data 2a. If the driver or the like has set all the course change points and the travel route is uniquely determined only by the set position data, the travel route and the time temporarily stored in the input route time temporary storage means 72. The data relating to the route time storage means 9 is transferred. When all the route change points are not set, the route automatic setting means 73 automatically sets the traveling route connecting the two points in the order of the inputted points and automatically sets the traveling route inputted by the driver or the like. The traveling route data from the starting point to the destination is completed by supplementing the route thus completed, and the completed traveling route data is stored in the route time storage means 9.

When the travel route data is completed, the route automatic setting means 73 calculates the scheduled passage time of the main intersection,
The calculated scheduled time is stored in the route time storage means 9 in association with the main intersection position.

When only the departure time is designated, the route automatic setting means 73 sequentially obtains the scheduled passage times of the respective main intersections based on the standard traveling time data between the main intersections included in the road data 2a. . When the departure point is between the main intersections, the standard travel time is calculated according to the section distance and the distance from the departure point to the main intersection. If there is a departure point on a road for which standard travel time data has not been set, calculate the distance traveled from the departure point to the road for which standard travel time data has been set, and according to the road width of that road. The traveling time of the road section is obtained based on the vehicle traveling speed set in advance. By sequentially performing such time calculation along the travel route, the scheduled passage time of each waypoint and the estimated arrival time of the destination are obtained.
When the departure time at a specific transit point is set, the scheduled passing time at the next main intersection is calculated from the set time.

When the estimated arrival time of the destination or the waypoint is set, the traveling time is subtracted from the destination or the waypoint toward the departure point or the previous waypoint to obtain each main intersection or the waypoint. Calculate the scheduled time of passage. For road sections that do not have standard travel time data, the travel time is calculated based on the distance of the road section.

When the setting of the traveling route, the calculation of the scheduled passage time and the estimated arrival time, and the storage of the calculated time are completed, the route automatic setting means 73 causes the route suitability determination start command 73.
A is output to activate the route suitability determination means 74. The route suitability determination unit 74 reads out the traveling route data stored in the route time storage unit 9 and also reads out the traffic information stored in the memory card mounted in the external data input unit 63 and relates to the set traveling route. It is checked whether or not there is traffic information, and if there is traffic information regarding the set travel route, that traffic information is stored in the route information storage means 75. The route suitability determination means 74 checks whether or not traffic information is stored in the traffic information storage means 62. When receiving the traffic information transmitted from the FM multiplex traffic information broadcasting station or beacon device, it is checked whether there is traffic information regarding the set traveling route, and if there is traffic information regarding the set traveling route, The traffic information is stored in the route information storage means 75. Route suitability determination means 7
4 activates the wireless communication device 61, calls the traffic information providing center, etc., and transmits the travel route data of the own vehicle to the traffic information providing center, etc. to inquire the latest traffic information regarding the travel route of the own vehicle. The answer information for the is stored in the route information storage means 75.

The route suitability determination means 74 determines the route time based on the data regarding the traffic direction rule for each intersection stored in the road map database 2 and the latest traffic information stored in the route information storage means 75. Storage means 9
It is determined whether or not the travel route and the scheduled travel time stored in are valid. If there is an intersection or road section where traveling is restricted when traveling along the travel route from the point of departure, the reason why it is restricted to that intersection or road section (for example, entry prohibited, left turn prohibited, ○ o'clock to × hour right turn) Restriction information storage means 76
Then, the validity of the traveling route is judged from the next intersection or the next road section. Route information storage means 7
If a section in which traffic congestion is likely to occur is detected based on the latest traffic information stored in 5, the data of the section is stored in the restriction information storage means 76. When the information such as the number of traffic jams and the time required to pass through the traffic jam section is obtained, or when the information on the detour is obtained, the information is also stored in the restriction information storage means 76.

When the checking of all the routes is completed, the route suitability determination means 74 reads the contents of the restriction information storage means 76. When the restriction information is not stored, the route suitability determination means 74 generates and outputs a signal for displaying the completion of the route setting on the screen, displays the completion of the route setting on the screen, and sets the signal. An operation menu for causing the driver or the like to select whether or not to perform route guidance based on the route that has been displayed is displayed on the screen. It should be noted that the message indicating that the route setting is completed, the inquiry message regarding whether or not to perform the route guidance, and the like may be output as voice messages via the voice synthesis output device 14.

When an inappropriate portion is stored in the restriction information storage means 76 as a route, the route suitability determination means 74
Generates and outputs a signal for displaying on a screen a point or section where traffic is restricted and the reason thereof. As a result, on the map displayed on the screen of the image display device 13, restricted sections or points are displayed, for example, in red or x, and on the screen, for example, ∘∘∘∘ to ∘x∘∘ is prohibited.
○○ ～ × h The reason why traffic is prohibited due to road construction is displayed. The traffic jam section is displayed in yellow, for example.
When information such as the number of traffic jams and the time required to pass through a traffic jam section is obtained, or when information about a detour is obtained, such information is also displayed on the screen. If a long-distance route is set and all routes cannot be displayed on the screen, display a map including the points where traffic is restricted first along the travel route, traffic restrictions (section), and reason. . If there is a passage restriction point (section) other than the displayed map screen, the operation menu for displaying the total number of inappropriate points for the route or other inappropriate points is displayed on the screen.

If there is an inappropriate route, the route suitability determining means 74 displays an operation menu on the screen for selecting whether to automatically change the route or input a corrected route.

When the automatic route change is selected, the automatic route setting means 73 is restarted. Route automatic setting means 73
Refers to the latest traffic information stored in the route information storage means 75, and searches for a route that can eliminate the inappropriate route portion stored in the restriction information storage means 76, The route obtained by the search and the scheduled time when the vehicle travels on the route are calculated, and the automatically corrected data on the obtained route and time are stored in the route time storage means 9. The route suitability determination means 74 obtains the latest traffic information for the automatically corrected route via the traffic information obtaining means 6, and
The suitability of the automatically corrected route is determined. As long as there is an inappropriate point or section, automatic route setting and route suitability determination will be repeated. When an appropriate route is set, the route suitability determination means 74
Displays that the automatic correction of the route is completed on the screen, and also displays the map and the corrected route of the relevant part on the screen. It may be possible to re-input the corrected route. Also, an operation menu for selecting whether or not to perform route guidance based on the corrected route is displayed on the screen.

When the manual input of the corrected route is selected for the unsuitable route, the route adequacy determination means 7 displays a cursor in the vicinity of the point determined as the unsuitable route and prompts the user to input the corrected route. . When the manual input of the corrected route is completed, the route suitability is determined based on the manually input corrected route. When an appropriate route is set, an operation menu for selecting whether to guide the route based on the corrected route is displayed on the screen.

If route guidance is selected, FIG.
The route guidance control device 10 shown in FIG.
The road map data including the current position of the vehicle is retrieved from the road map database 2 based on the own vehicle position data 3a supplied from the vehicle position data 3a, and the retrieved road map data is supplied to the image signal generation unit 12 so that the image display device 13 operates. A road map including the current position of the vehicle is displayed on the screen, and a vehicle position mark including the traveling direction of the vehicle is displayed on the road map. Further, the route guidance control device 10 displays the traveling route, the scheduled passage time and the like (including the estimated arrival time and the restart time) on the map based on the route data stored in the route time storage means 9. The vehicle is guided to run by outputting a voice message for guiding the traveling direction in front of the turning point. Even when the route guidance is not required, the route guidance control device 10 displays the traveling route, the estimated passing time, etc. on the map based on the route data stored in the route time storage means 9, and the own vehicle position data. The position and traveling direction of the vehicle may be displayed on the map based on 3a. The scheduled passage time may not be displayed on the screen at all times, but may be displayed according to the operation of the scheduled time display key (not shown).

The route suitability determination device 7 continues the route suitability determination operation even after the vehicle starts to travel. Automatic route setting means 73 in the route suitability determination device 7
Monitors the deviation between the scheduled traveling time stored in the route time storage means 9 and the actual traveling time on the basis of the current position of the vehicle and the time data supplied from the clock means 8, and the deviation is monitored in advance. When the set time (for example, 10 minutes) is exceeded, the estimated passage time is recalculated, the corrected estimated passage time is stored in the route time storage means 9, and then the route suitability determination start command 73a is output to output the route suitability. The determination means 74 is activated. As a result, it is checked whether or not there is a section where passage is restricted due to the scheduled passage time.

The route suitability determining means 74 monitors the traffic information supplied from the traffic information obtaining means 6 and obtains new traffic information (for example, accident information, traffic jam information, highway entrance closing information, etc.). In that case, new traffic information is stored in the route information storage means 75, and the adequacy of the travel route is determined based on the new traffic information. When the travel route is no longer valid, the route suitability determination means 74 needs to store the section in which the travel is restricted and the reason thereof in the restriction information storage means 76, and to change the path by using the voice synthesis output device 14. A message to that effect is output by a voice message, and the point or section that needs the route change and the reason (for example, accident, traffic jam, closure, etc.) are displayed on the screen of the image display device 13.
Further, the route suitability determination means 74 uses the route change request 74a.
Is output to activate the route automatic setting means 73 to automatically set an alternative route. The automatically set alternative route is stored in the route time storage means 9.

When the alternative route is automatically set based on the route change request 74a from the route suitability judging means 74,
The route automatic setting means 73 notifies the route guidance control device 10 shown in FIG. 1 that the alternative route has been automatically set. Upon receiving this notification, the route guidance control device 10 displays the alternative route on the screen and guides the vehicle based on the alternative route even when the route guidance is not selected. .

FIG. 4 is a flow chart showing the overall operation of the vehicle-mounted navigation device. When the desired travel route of the driver or the like is input in step S1, the latest traffic information is acquired via the traffic information acquisition means 6 in step S2,
The travel route input in step S3 is evaluated. If there is an unsuitable section as a route due to restrictions on traffic direction rules, accidents, traffic jams, etc. based on the latest traffic information, the unsuitable section and its reason are displayed on the screen or in a voice message (S4, S5). .

If there is an inappropriate route,
A menu for selecting re-input or automatic correction is displayed (S6). When the automatic correction is selected, the inappropriate portion is automatically corrected (S7). When there is no inappropriate part due to re-entry or automatic correction of the route, a menu for selecting whether or not route guidance is required is displayed (S
8) When the route guidance required is selected, the vehicle is guided based on the set traveling route (S9). When the route guidance is not required, a menu for selecting whether or not to display the route is displayed (S10), and when the route display is required, the route is displayed (S11).

The route suitability determination device 7 monitors the current position and time of the vehicle regardless of the presence or absence of route guidance and the presence or absence of route display, and continues to check whether the travel route is appropriate based on the latest traffic information. To do. For example, when the set route becomes unsuitable as the traveling route due to accident information or the like, the alternative route is searched, and the alternative route is displayed and guidance based on the alternative route is performed at least until the original route is returned (S12). ).

FIG. 5 is an explanatory view showing an example of a screen display of a traveling improper portion and its reason. FIG. 5 shows that the section indicated by X in the figure is prohibited from traffic due to road construction, and the detour route is shown by a dotted line U. A solid line J indicates a travel route input by a driver or the like, and a reference symbol T indicates a scheduled passage time at a main intersection or the like.

[0044]

As described above, the vehicle-mounted navigation device according to the present invention uses the data regarding the traffic direction rules stored in the road map database and the latest traffic information obtained through the traffic information obtaining means. Based on this, it is determined whether the travel route input by the driver or the like is valid, and if the input travel route is not appropriate, the display means displays the inappropriate point or section and the reason why it is not appropriate. Therefore, it is possible to inform the driver or the like of an unsuitable point or section for traveling and the reason of unsuitability. Therefore, the driver or the like can determine whether or not his / her favorite route is suitable as the traveling route. In addition, since inappropriate points and sections and their reasons are displayed, if the inappropriate reasons are, for example, traffic jams or temporary time limits, select another route depending on the necessity of passing through the points. It is possible to judge whether or not it is possible, and it is also possible to take measures such as shifting the time for traveling at that point or section. Since the latest traffic information is obtained via the traffic information obtaining means, it is possible to set an alternative route when new accident information or the like is obtained even while traveling. It is also possible to input the route such as long-distance drive after a few days in advance and check the adequacy of the traveling route in advance.

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle-mounted navigation device according to the present invention.

FIG. 2 is a block configuration diagram showing a specific example of a vehicle position detection device.

FIG. 3 is a block configuration diagram showing a specific example of a route suitability determination device.

FIG. 4 is a flowchart showing the overall operation of the vehicle-mounted navigation device.

FIG. 5 is an explanatory view showing an example of a screen display of an unsuitable place for traveling and its reason.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle-mounted navigation device 2 Road map database 3 Own vehicle position detection device 4 Travel route input means 5 Scheduled time input means 6 Traffic information acquisition means 7 Route suitability determination device 8 Clock means 9 Route time storage means 10 Route guidance device 11 Display device

Claims (3)

[Claims] 1. A road map database provided with data on traffic direction rules such as entry prohibition, right turn left prohibition, traffic time limit, traffic information acquisition means for obtaining the latest traffic information, and input of travel route Whether the input travel route is suitable for travel based on the travel route input means, data on the traffic direction rules provided in the road map database, and the latest traffic information obtained through the traffic information obtaining means. If the route suitability determination device determines whether or not the route suitability is determined to be inappropriate, the route suitability determination device that outputs the inappropriate point or section and the reason for the inappropriateness, and the inappropriate point or segment output from the route suitability determination device An on-vehicle navigation device, comprising: a display device for displaying an appropriate reason. 2. A road map database provided with data on traffic direction rules such as entry prohibition, turn prohibition, traffic time limit, travel route input means for inputting a travel route, and a travel direction provided in the road map database. A route adequacy determining device that determines whether the input traveling route is suitable for traveling based on data regarding rules, and outputs an inappropriate point or section and an unsuitable reason when it is determined to be inappropriate. An in-vehicle navigation device, comprising: an unsuitable point or section output from the route suitability determination device and a display device for displaying an unsuitable reason. 3. A traffic information acquisition means for acquiring the latest traffic information, a travel route input means for inputting a travel route, and the latest traffic information obtained through the traffic information acquisition means. A route suitability determination device that determines whether or not the input traveling route is suitable for traveling, and outputs an unsuitable point or section and an unsuitable reason when it is determined to be unsuitable, and output from the route suitability determination device. An in-vehicle navigation device, comprising: an unsuitable spot or section that has been displayed and a display device that displays an unsuitable reason.